There might be simpler ways to do this. I rarely do this myself. Anyway, this should work.

QuickTime 7 Pro lets you edit movies. In your case, you would open both movies, select one time line and select all then copy then move to the other movie, put the insertion indicator at the end of the movie and paste. Then you'd save the movie with the option to make it a self contained movie.

QuickTime X is supposed to have this feature, I haven't tried it with movies though I have edited audio this way.

If you do this a lot you might be able to put together an AppleScript that would join several movies using QuickTime.

when you put your individual .mov files into iMovie did you try to export them to iDvd? this is how i merge all my clips together to make my movies. i film concerts as a hobby, and my files always end up in multiple .mov or other formats. i just bring them up in iMovie, do what i have to do with chapters and such, then export to iDvd, or whatever program i wish to use. iDvd works the best for me. hope i could help.

when you put your individual .mov files into iMovie did you try to export them to iDvd? this is how i merge all my clips together to make my movies. i film concerts as a hobby, and my files always end up in multiple .mov or other formats. i just bring them up in iMovie, do what i have to do with chapters and such, then export to iDvd, or whatever program i wish to use. iDvd works the best for me. hope i could help.

I exported to Media Library first. I tried exporting but I couldn't add them later to my iDVD project. Instead, I exported to Media Library and then added them to iDVD, which treated them as individual movies.

__________________
Hardware / Software: The right tools for the job - be it Apple or otherwise.

hi, I know some freeware also supports to join multiple format videos into one. Freemake(freemake.com) is such a great software, completely free. I have been using it for long time for merging videos. have a try.